基于VBLAST系统的并行图像传输策略优化  

Parallel image transmission strategy optimization for VBLAST systems

作　　者：张庭园 李俊[2] 李小兵[3] 景小荣[2] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]重庆邮电大学通信与信息工程学院,重庆400065 [3]中兴通讯股份有限公司,深圳518057

出　　处：《重庆邮电大学学报（自然科学版）》2014年第4期488-493,513,共7页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市自然科学基金(CSTC2010BB2471)~~

摘　　要：为了缓解无线信道对图像传输的影响,综合考虑信源编码、信道编码及调制方式,提出了一种自适应VBLAST(vertical Bell labs layered space time)并行图像传输优化策略,该策略可根据信道环境,自适应选择信源编码、信道编码、调制和发送功率以满足并行传输各层的误码率要求,从而综合协调系统资源来提高接收端图像重建质量。数值仿真结果表明,该策略比其他非自适应策略或部分自适应策略在性能上具有明显的优势。In order to alleviate the effect of image transmission in wireless channel, an optimization strategy of the adaptive parallel image transmission is proposed in this paper for VBLAST systems by taking the source coding, channel coding and modulation types into comprehensive consideration. It can adaptively optimize the source coding, channel coding, modulation types and transmitting power in order to satisfy the requirement of the bit error rate of each transmission layer, which leads to the improvement of the quality of the image reconstruction. The simulation results indicate that the adaptive strategy has obvious performance superiority over the non-adaptive and part-adaptive ones.

关 键 词：垂直-贝尔实验室分层空时(VBLAST) 图像传输 不等错误保护 联合优化 

分 类 号：TN919.8[电子电信—通信与信息系统]